FTP processing files mutliple times

Question

Hello,
I have an issue, regarding the ftp scenario. I have configured the Quality of Service to "Exactly Once", Poll interval 120 seconds. I doubt that its performing as desired, because I see many files were processed many times.
My question is whats is the purpose of Exactly once and Exactly once in order. what if poll interval is small and execution overlaps i.e. first process in execution and poll interval reaches for second execution and so forth?
I want that any file written should be read once only.
Quick responses will be highly appreciated.
Jawed

Answer 1

Hi Javed,
>>Poll interval is small and execution overlaps i.e. first process in execution and poll interval reaches for second execution and so forth?
In EO case
1. all files from first process will be available (say 10).
2. second process starts (say 5 files from 1st process are still there to be processed) and 5 files are made available to XI
3. now XI need to process total 10 file
So in-total there were 15 files and all will be processed once and for each of them there will be an output from XI. But there is no guarantee that the first 10 files (of 1st process) will be delivered first and then the 5 files (2nd file)
In EOIO case
1. all files from first process will be available (say 10 files are available).
2. Since the mode is EOIO, all files are punt into one queue (say INPUTQUEUEU)
3. second process starts (say 5 files from 1st process are still there to be processed in INPUTQUEUE) and 5 files are made available to XI
4. They will also be appended to the end of the INPUTQUEUE.
3. Now XI need to process total 10 file
So in-total there were 15 files and all will be processed once and for each of them there will be an output from XI. Since they were fed into single queue INPUTQUEUE, there is a guarantee that the first 10 files (of 1st process) will be delivered first and then the 5 files (2nd file)
In both case the Read files need to be archived
Regards
Suraj
Edited by: S.R.Suraj on Sep 11, 2009 2:44 AM